<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	
   

	<title>播放器</title>
	<style type="text/css">
		div#box{
			width: 100px;height: 100px;
			background: red;transform:1s;
		}
		div#box:hover{
			width: 200px;
			height: 200px;
			background: green;
		}
	</style>
</head>
<body>
 <div id="box">
 	
 </div>


</body>
</html>